Bump julia-actions/cache from 1 to 2

Bumps [julia-actions/cache](https://github.com/julia-actions/cache) from 1 to 2.
- [Release notes](https://github.com/julia-actions/cache/releases)
- [Commits](julia-actions/cache@v1...v2)

---
updated-dependencies:
- dependency-name: julia-actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/CI.yml

@@ -42,7 +42,7 @@ jobs:
  with:
  version: ${{ matrix.version }}
  arch: ${{ matrix.arch }}
- - uses: julia-actions/cache@v1
+ - uses: julia-actions/cache@v2
  - uses: julia-actions/julia-buildpkg@v1
  - uses: julia-actions/julia-runtest@v1
  - uses: julia-actions/julia-processcoverage@v1
@@ -63,7 +63,7 @@ jobs:
  - uses: julia-actions/setup-julia@v2
  with:
  version: '1'
- - uses: julia-actions/cache@v1
+ - uses: julia-actions/cache@v2
  - name: Configure doc environment
  shell: julia --project=docs --color=yes {0}
  run: |